Muay Thai has been proven to work well with mma a billion times however I think Sanda in time, will find it's way into a lot more gyms. I also think the side kick is a very under used weapon but that is just my opinion.

Styles cannot fight eachother. Only people can fight eachother. There is no clear answer here. Are you asking what is better, using elbows and knees to the head or using takedowns? Neither. Both work well, it is the fighter that determines the outcome.

It's true sanda has takedowns, but not really finishing moves. Elbows and knees to the head, on the other hand, are well proven to finish fights. I say this having fought in both sanda and muay thai.

Although, landing a good sanshou throw on hard concrete is much different than inside of a ring. So who the hell knows? It can go either way.

Dropping people on their head is a very good finishing maneuver.

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I've trained both Muay Thai and San Shou. I'm better suited to San Shou, I don't know why. After saying that though I like the fact that Muay Thai toughens their fighters up better than most San Shou fighters.